Means for charging storage batteries of telephone systems.



PATBNTED MAY 1, 1906.

T. G. MARTIN. MEANS FOR CHARGING STORAGE BATTERIES 0P TELEPHONE SYSTEMS.

APPLIOATIOH I'ILED DEO.12. 1904.

4 SHEETS-SHEET 1.

No. 819,073. PATENTED MAY 1, 1906 T. G. MARTIN.

MEANS FOR CHARGING STORAGE BATTERIES 0F TELEPHONE SYSTEMS.

APPLICATION FILED DEC. 12. 1904.

4 SHEETSSHEET 2.

PATENTED MAY 1, 1906.

T. G. MARTIN.

MEANS FOR CHARGING STORAGE BATTERIES OF TELEPHONE SYSTEMS.

APPLICATION FILED DEO.12. 190%.

1 SHEETSSHEET 3.

PATENTED MAY 1, 1906 T. -G. MARTIN. MEANS FOR CHARGING STORAGE BATTERIES OF TELEPHONE SYSTEMS.

APPLICATION FILED DEO.12,1904.

4 SHEETSSHEET 4.,

y- ,S iffazmyfi KEYED ESTATES PATEJT @FFICIE.

TALBOT G. MARTIN, OF CHICAGO, ILLINOIS,

ASSIGNOR TO AUTO MATIG Specification of Letters Patent.

.rateizteo may 1, 1906.

Application filed Drccmber 12,1904. Serial No. 236,540,

iii/1 .I/ no. c0771: at l, TALno'r G. MARTIN, a nitcd Stat-es of America, and a resident of cll'lil'ftlgO, Cook count-y. Illinois, have invented a certain new and useful .lm-

remcnt in Means for Charging Storagc understood. may be employed at the manual cxchangc for furnishing curren to thcsubscrihcrs' lines for either signaling or talking purposes, or for both; and my invention. contemplalcs an improved arrangement for charging {hr said storage battcry, and thcrc by maintiiiii ingit in condition to at all times properly supply the subscribers lines or olhcr circuits with current for the desired purposc; but, as will hereinafter more l'ully appear, my invcntion also contemplates, broadly. the automatic cminccting and disconnecting ol' the gcncrator or other sourcc oi currcnt from which the said storage bat- {cry is charged through the medium ol'somc portion ol thc switching apparatus ol an automatic tclephone-exchange and in such manncr that [he chai'ging-circuit is only closed when some portion thereof not in use For other purposes.

(lcncrally stated. the object of my invention is thcrc. irc thc provision of aniinprovcd, simplil'icd, and highly cllicicnt arrangement for charging the storage battery ol" a tclcphone ccr, to pro'i'idc an improved (anistrm-tion and arrangement whereby a tclcphonc trunk-line may when not in usc for talking or other purposes be employed for supplying charging-current to the storage batlcry. I

nolhcr object is to providc a simple and cliicicnt arrangement whereby the charging iii a storage hartij-ry may be automatically controilcd through the medium ol some suitable portion ol' the apparatus of an automatic tclc;ilioncnxl'hangc.

A iurrhor ohjw-t is to providc a construc lion and arrangcincnt whcrcbv a so-callcd "sclc loi .itch." and so-i-allcd umncctorinvitciics oi the mitoinatio telephone-0xchange systcm may he (unploycd for automatically connecting and disconnecting the generator or other source ol current from which the storage b.- .ttcr v is chaigcd and wherchy some portion ol a lim----oiri,uit may when not in use for talking or other purposes bc automalimilly included and cmployml a portion of the ch.-1rging-circuil and thou automatically cliininatcd from such chargingcircuit as soon as the said lino-circuit is requircd for service bctwccn subscribers.

It is also an object, of course, to provido certain details and lcaturcs of improvement tending to incrcasc the general etlicicncy and scrviccability of a storage-hatterycharging arrangement of this particular character.

To thc l'orcgoing and other useful ends my invention consists in matters hereinafter set forth and claimed.

lnthe acconmanying drawings, Figure l is a diagram illustrating a lrunl -linc conncction bclwccn a manual exchange and an automatic cxchangc and showing a storage bat tcry at the manual exchange and a charginggcncrator at the automatic exchange, together with the circuits and switching deviccs for controlling the charging-circuit, the apparatus as a \vholc being shown in its normal or at-rcst condition and being of such character as to embody the principles of my: invention. Fig. 2 is a fragmentary or detail view of that portion of the selector-switch mechanism which automatically opens the charging-circuit when the operator at the manual exchange establishes connection with the trunlclinc and then proceeds to call a subscriber of the automatic exchange. Fig. I; a diagrammatic view similar to Fig. I, but showing the manner in which the charglug-circuit is opened and the charging-generalor thereby disconncctcd when the subscribcr at the automatic exchange establishcs connection with the said trunl -line and then calls the operator at the manual exchange. Fig.4 is also a diagrammatic view similar to Fig. 1, but showing the manncr in which the charging-circuitisopcncd and the charging-generator thereby disconnected whcn the operator at the manual exchange. makes connection with the trunk-line and calls a subscriber ol' the automatic exchangcf Fig. 5 is a perspective vicw ol' ccrtain portions of the Wcll-known conncctor-switch, showing the side switch and a section of tho switch-shaft with the private wiper A and line-wi ers B and C secured thereon.

As't us illustrated, it will be seen that all devices at the left of the line X X in Figs. 1,

5 3, and i are included in the apparatus of the manual exchange atone station, while all the devices shown at the right of said line are included in the apparatus of the automatic exchange at another station, the two stations being connected by a trunk-line A. In the such portions of the switching devices have been shown as are necessary to a clear and full understandin of my invention. The devices shown an enable those skilled in the art to readily iden- 2o tii'y the different switches and the character is commonly known sea exchange.

5 s ring b 0 age battery exchange of ap aratus in connection with which I have e ected to show and describe my invention. In Fig. 1, for exam lo, the trunk-line A terminates at the manua exchange in what trunk-jack B- that is to say, a springjack in which the usual 0 erators cord-plugCis inserted when a subsori er of the manual exchange desires to converse with a subscriber of the automatic The tip-spring b of the said spring-jack is normally grounded at b, the ground connection preferably including a condenser b and a drop or other callin signal b'f. Itwill also be seen that the ower of the said s ring-jack is normally isconnected from the ower side of the trunkline, so as to permitthe lower side of the trunk line to be normally connected'to ground at b, and it will be seen that a storb" is preferably included in this second ground connection at the manual exchange. The said battery b is, it will be understood, employed in furnishing current to the circuits and ap aratus of the manual for either ta king or signaling urposes, or for both. By the provision o the contacts 1, 2, 3, and 4 the insertion in-the jack of the plug C serves to disconnect the drop I) from one side of the trunk-line and 5c the storage'battery b from the other side of the trunk-line and to connect the j ack-spring b" with the lower side of said line. In this way the said drop and battery are normally connected with the trunk-line, but are cut off or disconnected therefrom as soon as the manual-board operator establishes connection between her cord-circuitand the said trunk-line. As stated, the said trunk-line connects the manual telephone-exchange with the automatic telephone-exchange, and at the said automatic exchange the so-callcd selector-switch which is individual to the trunk-line A and which is employed by the manual-board op'eratorat the other end of the line for automatically establishing connecindicated are sufiicient to tion either directly or indirectly; with the line of any subscriber 10f; the ."tlhtomh'ticexchange is re resented bythe so, cal-led,vertical relay and the otaiyvrreay E and by the so-called bridge cut-off relay F. Another familiar feature of a selector-switch of this character consists of the norigal postai'in G (shown at two places in each 'agram) and which, it will be remembered'gidfusually secured to the upper end portion-ht, the rotary, and endwise or vertically 'rnovable switch-shaft 1-1. This normal post-arm. is

shown in Fig. 2, and in this figure the vertical magnet Iis also indicated-t at istosay, the magnet for producing the vertical stiep-bystep movement of. the switch-shaft If desired, condensers J and K can be interosed in opposite sides of the line-circuit. the rivate wiper of the side switch of the so-cal ed connector-switch by which a subscriber of the automatic exchange establishes connection with the trunk-line leading to the manual exchange is indicated at L. Current for operating the relays I), E, and F is obtained from the batter M.

With the arrangement s own it is preferable to chalgge the storage battery I) "from the being located at the generator the latter Inasmuch as this is automatic exchange.

accom lished by including one side of the trunkine in the chargin -circuit, it is desirable, of course, that the ciarging of the bat- 'tery b be accom lished without interfering in any way with t 1e use of the trunk-line for connecting subscribers of the two different exchanges. For this reason the arrangement is preferably such that the said generator N or other suitable source of current is automatically disconnected from the trunk-line as soon as the operator at the manual exchange after inserting the plug (3 in the jack D has operated the selector-switch at the automatic exchan e. This, it will be seen, may be accomplis ed by providing the three switch-springs g, g, and g and arranging them in such position that springs g and g' are separated and springs g and 9 brought together, as soon as the shaft H is stepped up suiliciently to remove the pressure of the normal post-arm G upon the end of thespriug g. Normally current from the enerator l passes from ground 1 to grounr b thence through the battery I) to the contact-point .1, thence through the spring contact 3, through the lower side of the trunk-line to the spring-contact g, thence through contact 9, through the normally closed contacts 6 and 6, through the conductor n, to the other pole of the/said generator. Obviously, therefore, the charging-circuit thus maintained during the time that the trunk-line is not in use is opened as soon as the operator at the manual exchange operates the scconnection directly or inilircctly with a subwhich the subscriher of the automatic cxl change estahlishes connection with the trunkline will not only close a circuit including the bridge cut-otl' relay F, so as to cut oil or restore the continuity of the bridge in which the relays D and E are included, but, will also i ellect. a (lisconnection of the generator N from the llllO-(IYCUIL The said connectorswitch comprises, as usual, a set of side-T switch wipers. among which is found the soalled "private" side-switch wiper IJ, that is connected directly with the private wiper A.

lt is well known that the line-wipers B and 5 t" are adapted to engage the line-terminals ol' 1 lines that terminate in the line-hank I). Assumin; that the line A terminates through the conductors E and F, as indicated, in the tenth terminal of the first level of the linehank l), then the private normal conductor G, that connects the bridge cut-otl relay F with the "connector private hank II, terminutes c rrespon lingly in the tenth contact ot' the first level of the said private bank. lt is well known that when the connector establishes connection with a line the sidcswitch wipers are in third position. Therefore when an automatic subscriber calls the line A while the line-wipers B and C are connected with the normal conductors E and 1'" that lead to the said line the private wiper it connected with the corresponding private normal G. 'lhen v since the private side-switch 'iper L is in third or calling posh tion at the time, it is connected to ground 1 through the contact-point I. said side-switch wiper is connected with the private wiper A the private normal G is grounded, while the line-whens B and are in connection with the line A. Therefore when the said connector-switch causes its private wiper L of the side switch to es tab ish connect wn between the ground 5 and the springccntact 9 it is evident that a local circuit is completed. The connection i90- tween the. private normal relay F and sideswitch wiper L is shown diagrammatically in Figs. 1, 3, and 4, so that the said local circuit is plainly shown between ground I and m and includes the conductor in, the coil of the l ridge cul-oll' relay F, the contacts 9 and g. and the said private wiper L of the side switch included in the mechanism of the connector-switch which the subscriber employs .in establishing connection with the trunkline A. The closing of this circuit causes the.

Also since only sepai opt-u the are includ r and r conta t-w tucis r not will he s: shitoi the llli" circuit tlicu in r in series.

uuuiual lfil' 't v or" thitl llt nfi i ut i an all so ol' mil also be se n lint.

\ manual i and f1".

springn leature c )resonl i 1' 1 v I? l l 120 autoniat i the tron. [25

poses i from our (.L'L

' type disclosed in Patent No. 815,176, issued March 13,1906.

What I claim as my invention is, Y 1. A telephone system comprising a man ual exchange, an automatic exchange, a

trunk-line extending between the two exchangesjstorage battery at the manual exchange, a fsource of current at the automatic exchange for charging the said storage battery, together with a charging-circuit including one side of the said trunk-line. I Y

2. A telephone system comprisingwstorage batter ,a source of current for charging said battery, and a selector-switch pro vided with means for opening the charging-' circuit when the switch is operated. I

3. A telephone system comprising a storage battery, a source of current for charging said-battery, a normally closed charging-circuit including the said battery and source of current, and a selector-switch provided with a bridge cut-off relay adapted when energized to open the said charging-circuit.v

4. A telephone'system comprising a stor age battery, a source of current for charging said battery, a normall cluding said battery an source of current, and a selector-switch provided with a normal post-arm adapted when actuated to open.

the said charging-circuit.

- 5. Atelephonesystemtcomprising a trunka storage battery, a source of' -current': for charging said battery, a normally closed charging-circuit includin said battery and line,

source of current, and inc uding also one side of said trunk-line, and an automatic step-byste switch-provided with means-for opening sai char ing-circuit when the line, a storage battery normall charging-current .normally connected between ground and thes'ame side of the trunk-line, a" selector-switch allotted to the said trunk-line and normally connected therewith, and a connector-switch private wiper, said selector-switch having a bridge cut-otf relay providedwith a nor mally open circuit adapted to be closed by I closed circuit in-' trunk-line 1 to be use( for talking'or signaling purposes 6. A telephone system comprising a trunk connected; between round and one side 0 said line, a

' SOUI'CG O SOllICG) Of current the said connector-switch private wi er when the latter is actuated in the'estab hment of connection Withthe trunk-line, and

a normally closedchargin -circuit including said battery and source 0 current, and in-, cluding also one side of the trunk-line, said charging circuit haying normally closed switch-contacts adapted to be opened by the energizin ofsaid bridge cut-off relay.

7. te e'phone system comprising a line, a storage batte'rynormally connected With'one end of said'line, a source of charging-current normally connected With the otherend of said line, whereby the battery is su "plied with charging-current wherever the fine is not in use for other purposes, and an electromagnetic switch associated with the end of.

the line connected with the source of charging-current, and adapted to be controlled from the other end of the lit e, said switch becontacts adaptedto disconnectthe source of 7 ing provided" with normally closed'switchcharging-current when the switch isoperated from the other end of the line.

8. A telephone-system gomprising a talking-conductor, a storage i'itftter'za asource of I charging-current, a normally v ing-circuitincluding said battery and source losed, chargof current, and' also includirg said talkii f conductor, and'a'n electromag etic switchin the said source; of current. from the talking n uctor. i i

Y 97111 a 1 1 16 sys emsec mb a of a line-wire," a stora atterv normally connected with one. Q

isaid, ineewire, a

. swi device adapted when operated to disconnect source-of charging-current normally' connect- "ed with the other end/of said line-Wire, a plug-switch forv disconnecting the said bat- ,tery when it desired to use theline for go when it is desiredt'o use the 

